When query the data consider append columns when the new page of data contains new columns

[zshamrock]

As DynamoDB is the column based database, not necessary all the rows have the same columns (although usually they are). So if fetch the first page of data, and columns are displayed, when fetching the next page and new columns were detected should append them and start display their values there too.

Also when decide on the columns to display might need to iterate over all the data in the page instead of the first item (which is happening currently) to detect all the columns.

[zshamrock]

Is there a way to figure out all columns without ever iterating over the data? Does DynamoDB have the API to achieve this? Worth to investigate.